An interphase with changing properties and the mechanism of deformation in particulate-filled polymers

被引:39
作者
Voros, G
Fekete, E
Pukanszky, B
机构
[1] Hungarian Acad Sci, Cent Res Inst Chem, H-1525 Budapest, Hungary
[2] Eotvos Lorand Univ, Inst Gen Phys, H-1445 Budapest, Hungary
[3] Tech Univ Budapest, Dept Plast & Rubber Technol, H-1521 Budapest, Hungary
关键词
particulate filled polymers; stress analysis; interphase with changing properties; tensile yield stress; composition dependence; debonding; matrix yielding; interfacial interaction; particle size dependence;
D O I
10.1080/00218469708010541
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The comparison of the results of calculations based on experimental data with those derived from a simple, two phase, elastic model proved the existence of a hard interphase in particulate-filled composites. Moreover, beside elastic properties, also other mechanical characteristics of the interphase, including yield stress, are different from those of the components. An energy analysis showed that the relationship between the yield stress of the matrix and the debonding stress determines the mechanism of deformation. Strong adhesion leads to matrix yielding, while decreased interaction leads to debonding with a corresponding dependence of composite yield stress on filler content. Particle size, interaction and interphase properties determine the stress necessary to separate the matrix/filler interface. The thickness of the interphase depends on the strength of the interaction; a linear correlation was found between the size of the interlayer and the reversible work of adhesion.
引用
收藏
页码:229 / 250
页数:22
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